<template>
<div>
  <!-- 面包屑导航区-->
  <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>商品管理</el-breadcrumb-item>
    <el-breadcrumb-item>添加商品</el-breadcrumb-item>
  </el-breadcrumb>

<!--  卡片视图区-->
  <el-card>

    <!--提示区域-->
    <el-alert title="添加商品信息" type="info"
              center show-icon :closable="false">
    </el-alert>

<!--    步骤条区域-->
    <el-steps :space="200" :active="activeIndex - 0" finish-status="success"
              align-center>
      <el-step title="基本信息"></el-step>
      <el-step title="商品参数"></el-step>
      <el-step title="商品属性"></el-step>
      <el-step title="商品图片"></el-step>
      <el-step title="商品内容"></el-step>
      <el-step title="完成"></el-step>
    </el-steps>

<!--    tab栏区域-->
    <el-form :model="addForm"
             :rules="addFormrules"
             ref="addFormRef"
             label-width="100px"
             label-position="top">
      <el-tabs :tab-position="'left'" v-model="activeIndex"
               :before-leave="beforeTabLeave" @tab-click="tabClicked">
        <el-tab-pane label="基本信息" name="0">
          <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
          </el-form-item>
          <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addForm.goods_price" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品重量" prop="goods_weigth">
            <el-input v-model="addForm.goods_weigth" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader expand-trigger="hover"
                         :options="catelist" :props="cateProps"
                         v-model="addForm.goods_cat" @change="handleChange">
            </el-cascader>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品参数" name="1">
<!--          渲染表单的Item项-->
          <el-form-item :label="item.attr_name"
                        v-for="item in manyTableData"
                        :key="item.attr_id">
<!--            复选框组-->
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox :label="cb"
                           v-for="(cb, i) in item.attr_vals"
                           :key="i" border></el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品属性" name="2">
          <el-form-item :label="item.attr_name"
                        v-for="item in onlyTableData"
                        :key="item.attr_id">
            <el-input v-model="item.attr_vals"></el-input>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品图片" name="3">
<!--            action 表示图片要上传到的后台API地址-->
          <el-upload :action="uploadURL"
                     :on-preview="handlePreview"
                     :on-remove="handleRemove"
                     list-type="picture"
                     :headers="headerObj"
                     :on-success="handleSuccess">
            <el-button size="small" type="primary">点击上传</el-button>
            <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
          </el-upload>
        </el-tab-pane>
        <el-tab-pane label="商品内容" name="4">
<!--          富文本编辑器组件-->
          <quill-editor v-model="addForm.goods_introduce"></quill-editor>
          <el-button type="primary" class="btnAdd" @click="Add">添加商品</el-button>
        </el-tab-pane>
      </el-tabs>
    </el-form>
  </el-card>

<!--  图片预览对话框-->
  <el-dialog title="图片预览"
             :visible.sync="previewVisible"
             width="50%">
    <img :src="previewPath" alt="图片加载失败！" class="previewImg">
  </el-dialog>
</div>
</template>

<script>
import _ from 'lodash'

export default {
  name: 'Add.vue',
  data() {
    return {
      // 进度条进行步骤
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weigth: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 上传图片临时路径路径数组
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      // 添加商品的表单校验规则
      addFormrules: {
        goods_name: [
          {
            required: true,
            message: '请输入商品内容',
            tigger: 'blur'
          }
        ],
        goods_price: [
          {
            required: true,
            message: '请输入商品价格',
            tigger: 'blur'
          }
        ],
        goods_weigth: [
          {
            required: true,
            message: '请输入商品重量',
            tigger: 'blur'
          }
        ],
        goods_number: [
          {
            required: true,
            message: '请输入商品数量',
            tigger: 'blur'
          }
        ],
        goods_cat: []
      },
      // 商品分类列表
      catelist: [],
      // 商品分类级联选择数据
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表参数
      onlyTableData: [],
      // 伤处图片的URL地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 添加图片上传时的请求头token
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片路径
      previewPath: '',
      // 控制图片预览对话框显示隐藏
      previewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败！')
      }
      this.catelist = res.data
    },
    // 级联选择器中选项变化，会触发这个函数
    handleChange() {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 切换标签页前触发函数
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签页名字是：' + oldActiveName)
      // console.log('即将进入的标签页名字是：' + activeName)
      // return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选中商品分类！')
        return false
      }
    },
    // 点击tab标签后发生的事件
    async tabClicked() {
      // console.log(this.activeIndex)
      if (this.activeIndex === '1') {
        // console.log('动态参数')
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }
        // console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败！')
        }

        // console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      // console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove(file) {
      // console.log(file)
      // 1、获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2、从pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      // 3、调用数组的splice方法，把图片信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1)
      // console.log(this.addForm)
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      // console.log(response)
      // 1、拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2、将图片信息对象，push到pics数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    Add() {
      // console.log(this.addForm)
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        // 执行添加商品业务逻辑
        // lodash cloneDee
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(',')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs

        // 发起请求
        // 商品的名称,必须是唯一的
        console.log(form)
        const { data: res } = await this.$http.post('goods', form)

        // console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }

        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
        // console.log(form)
      })
    }
  },
  computed: {
    // 获取三级分类id
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style scoped>
.el-checkbox{
  margin: 0 10px 10px !important;
}
.previewImg{
  width: 100%;
}
.btnAdd{
  margin-top: 15px;
}
</style>
